What did Fresnel prove about the addition of sinusoidal functions?
Equal to zero
Creates a square wave
Analogous to adding forces
Causes destructive interference
Answer
Fresnel proved that the addition of sinusoidal functions of the same frequency but different phases is analogous to the addition of forces with different directions. This was a key part of his argument for the wave theory of light.
Shedding Light on Augustin-Jean Fresnel: The Brilliant Mind Behind Modern Optics
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